:root {
  color-scheme: light;
  --bg: #f4f4f0;
  --paper: #f4f4f0;
  --ink: #050505;
  --muted: #4d4d48;
  --line: #050505;
  --accent: #e61919;
  --field: #eae8e3;
}

* {
  box-sizing: border-box;
}

html {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.45;
  background: var(--bg);
  color: var(--ink);
}

body {
  margin: 0;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  content: "";
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 160 160' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.18'/%3E%3C/svg%3E");
  mix-blend-mode: multiply;
  opacity: 0.22;
}

a {
  color: inherit;
  text-decoration-thickness: 2px;
  text-underline-offset: 0.2em;
}

.site {
  max-width: 1160px;
  margin: 0 auto;
  padding: 24px 18px 48px;
}

.topbar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1px;
  margin-bottom: 18px;
  background: var(--line);
  border: 2px solid var(--line);
}

.brand {
  padding: 12px 14px;
  background: var(--paper);
  font-size: 13px;
  font-weight: 900;
  line-height: 1;
  letter-spacing: 0;
  text-transform: uppercase;
}

.nav {
  display: flex;
  gap: 1px;
  background: var(--line);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 12px;
  letter-spacing: 0;
  line-height: 1;
  text-transform: uppercase;
}

.nav a {
  display: flex;
  align-items: center;
  background: var(--paper);
  color: var(--ink);
  padding: 13px 14px;
  text-decoration: none;
}

.nav a:hover {
  background: var(--accent);
  color: var(--paper);
}

.document {
  background: var(--paper);
  border: 2px solid var(--line);
  padding: 34px;
}

h1 {
  margin: 0;
  font-size: clamp(4.2rem, 13vw, 10rem);
  font-weight: 950;
  line-height: 0.86;
  letter-spacing: 0;
  text-transform: uppercase;
}

.meta {
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 15px;
}

.summary {
  margin: 0 0 32px;
  padding: 18px;
  background: var(--field);
  border-left: 10px solid var(--accent);
}

h2 {
  margin: 6px 0 18px;
  font-size: clamp(2.4rem, 6vw, 5.7rem);
  font-weight: 950;
  line-height: 0.9;
  letter-spacing: 0;
  text-transform: uppercase;
}

p {
  margin: 0 0 14px;
}

ul {
  margin: 0 0 16px 22px;
  padding: 0;
}

li {
  margin: 6px 0;
}

.support-document {
  padding: 0;
}

.support-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, 0.65fr);
  gap: 1px;
  background: var(--line);
  border-bottom: 2px solid var(--line);
}

.hero-copy,
.support-panel {
  background: var(--paper);
}

.eyebrow {
  margin: 0 0 16px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero-copy {
  min-height: 500px;
  padding: 28px 28px 34px;
  display: grid;
  align-content: space-between;
}

.lead {
  max-width: 52ch;
  margin: 28px 0 0;
  color: var(--muted);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 13px;
  letter-spacing: 0;
  text-transform: uppercase;
}

.support-panel {
  display: grid;
  align-content: end;
  padding: 24px;
}

.panel-kicker {
  margin: 0 0 18px;
  color: var(--accent);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

.email-link {
  display: block;
  width: 100%;
  border: 2px solid var(--line);
  background: var(--ink);
  color: var(--paper);
  margin-bottom: 22px;
  overflow-wrap: anywhere;
  padding: 16px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: clamp(1.05rem, 2.1vw, 1.5rem);
  font-weight: 900;
  letter-spacing: 0;
  text-decoration: none;
  text-transform: uppercase;
}

.email-link:hover {
  background: var(--accent);
  color: var(--paper);
}

.telemetry {
  display: grid;
  gap: 1px;
  margin: 0;
  background: var(--line);
  border: 2px solid var(--line);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 12px;
  letter-spacing: 0;
  text-transform: uppercase;
}

.telemetry div {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
}

.telemetry dt,
.telemetry dd {
  margin: 0;
  background: var(--paper);
  padding: 10px;
}

.telemetry dt {
  color: var(--muted);
}

.telemetry dd {
  font-weight: 900;
}

.panel-note {
  margin: 18px 0 0;
  color: var(--muted);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 12px;
  letter-spacing: 0;
  text-transform: uppercase;
}

.support-stripe {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border-bottom: 2px solid var(--line);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

.support-stripe span {
  background: var(--accent);
  color: var(--paper);
  padding: 9px 12px;
}

.rail-diagram {
  display: grid;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  gap: 0;
  height: 110px;
  margin: 28px;
  border: 4px solid var(--line);
  border-left-width: 18px;
  border-right-width: 18px;
}

.rail-diagram span {
  display: block;
  border-left: 7px solid var(--line);
}

.support-document section:not(.support-hero) {
  padding: 0 28px 30px;
}

.section-code {
  margin: 0 0 8px;
  color: var(--accent);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

.check-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 2px solid var(--line);
}

.check-grid > div {
  min-height: 210px;
  background: var(--paper);
  padding: 14px;
  display: grid;
  align-content: start;
}

.check-grid p {
  color: var(--muted);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 12px;
  letter-spacing: 0;
  text-transform: uppercase;
}

.check-index {
  color: var(--accent) !important;
  font-size: 42px !important;
  font-weight: 950;
  line-height: 0.9;
}

.check-title {
  margin: 22px 0 8px;
  color: var(--ink) !important;
  font-size: 14px !important;
  font-weight: 950;
}

.support-list {
  display: grid;
  gap: 1px;
  margin: 0 0 8px;
  padding: 0;
  background: var(--line);
  border: 2px solid var(--line);
  list-style: none;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 13px;
  letter-spacing: 0;
  text-transform: uppercase;
}

.support-list li {
  margin: 0;
  background: var(--paper);
  padding: 13px 14px;
}

.support-list li::before {
  color: var(--accent);
  content: ">>> ";
  font-weight: 900;
}

.footer {
  margin-top: 24px;
  color: var(--muted);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 12px;
  letter-spacing: 0;
  text-transform: uppercase;
}

@media (max-width: 640px) {
  .site {
    padding: 24px 14px 40px;
  }

  .topbar {
    grid-template-columns: 1fr;
  }

  .document {
    padding: 22px 16px;
  }

  .support-document {
    padding: 0;
  }

  .support-hero {
    grid-template-columns: 1fr;
  }

  .hero-copy {
    min-height: 360px;
    padding: 20px;
  }

  .support-panel {
    padding: 20px;
  }

  .support-stripe {
    grid-template-columns: 1fr;
  }

  .support-document section:not(.support-hero) {
    padding: 0 20px 24px;
  }

  .rail-diagram {
    height: 74px;
    margin: 20px;
  }

  .check-grid {
    grid-template-columns: 1fr;
  }

  .check-grid > div {
    min-height: 0;
  }

  h1 {
    font-size: clamp(4.1rem, 18vw, 6.4rem);
  }
}